The Starrett ROLLER-76-1 Series is a 1kN (225lbf) capacity test fixture ideal for testing the tensile strength of rope, filament, string, yarns, etc. The test fixture consists of a 20mm diameter guide roller which is used to wrap the sample around. The maximum sample diameter for this fixture is 2mm. The sample is tightened to the test fixture with a clamping rubber jaw. During tension, the guide roller generates a slow notch-free stress ensuring that the sample does not break in the roller or clamping area. The ROLLER-76-1 is supplied in pairs (upper and lower grip).